The Jeffrey Mansion in Bexley (east side of Columbus) is located behind St. Charles and is rented out as a party house sometimes. Mr. Jeffrey is supposed to have hung himself in the house and willed the grounds to the city of Bexley; today you can sometimes catch a glimpse of him, still hanging in the house. He's also heard whistling as he walks around his house, which was built in the early 1900s.
Rubio, Josie. "Ghost Stories." Columbus Monthly Oct. 2003: 32-39.